Individual and Sociolinguistic Differences in Language Background Predict Stroop Performance

Area of Science:

• Cognitive Psychology
• Psycholinguistics
• Neuroscience of Language

Background:

• Bilingualism research often overlooks individual differences in language experience.
• Sociolinguistic context, the environment where languages are used, can influence cognitive processes.
• Cognitive control is a key executive function affected by bilingualism.

Purpose of the Study:

• To investigate how varying language experience and sociolinguistic context affect cognitive control in Spanish-English bilinguals.
• To determine if individual differences in L2 proficiency, exposure, and non-verbal reasoning predict performance on a cognitive task.
• To compare cognitive control across different sociolinguistic contexts (Midwest vs. Southern California).

Main Methods:

• 146 Spanish-English bilinguals completed a non-linguistic Stroop arrows task measuring cognitive control.
• Language experience was assessed via L2 proficiency, exposure, age of acquisition, and vocabulary.
• Cognitive abilities were measured using non-verbal reasoning tests.

Main Results:

• Individual differences in language experience (proficiency, exposure, vocabulary) and cognitive abilities (non-verbal reasoning) predicted more efficient Stroop task performance.
• Participants from the Midwest showed smaller Stroop and facilitation effects compared to those in Southern California.
• No significant group differences were found for the inhibition effect.

Conclusions:

• Cognitive consequences of bilingualism are influenced by a continuum of language experiences, not just bilingual status.
• Sociolinguistic environments play a crucial role and must be considered in bilingualism research.
• Future studies should integrate individual linguistic histories and naturalistic language use contexts.